GENERAL50712

• Permit No: C1981034
• IBM Index Class Name: General Documents
• Doc Date: 7/29/1988
• Doc Name: PROPOSED DECISION & FINDINGS OF COMPLIANCE FOR RN1
• Permit Index Doc Type: FINDINGS
• Media Type: D
• Archive: No

addit~nal sites, compositing the top ~ree feet of material. One
of these samples had a pH of 4.6 and an electrical conductivity of
4150 umhos/cm. The results of this testing led to the Division's
request that GMCC develop a plan to mitigate the presence of
acid-forming spoil on the regraded surface.
The Division proposes to approve the applicant's plan for disposal
of debris, acid-forming or toxic materials, or materials
constituting a fire hazard in a manner designed to prevent
contamination of ground or surface waters. GMCC will bury known
acidic spoils, per their plan in Rule 2.05.4(2)(e)(vi), and then
sample the regraded spoil on a 300 foot grid for pH and acid-base
potential. In locations of low acidity or low buffering capacity
the operator has committed to lime amendments for neutralization.
No contingency plan has been developed to prevent sustained
combustion of flammable materials but there have been no instances
of spontaneous combustion of the waste material in the twelve years
of operation by the applicant. In addition, all hazardous
materials will be removed from the site during the 1988
reclamation. (4.14.3(1)(a)).
2. The Division proposes to approve the method and design
specifications for covering of acid-and toxic-forming materials in
order to prevent leaching into surface and ground water and to
insure backfill stability. c~2CC will bury known acidic spoils below
the rooting depth and above the water table, per their plan in Rule
2.05.4(2)(e)(vi). (4.14.3(2)).
3. The applicant has submitted a
rills and gullies. This plan
found in section 2.05.4(2)(c)
commits to the preparation of
June, and the repair of gulli~
August 31 of each year.
plan for reclamation of excessive
is required by Rule (4.14.6(1) and is
of the permit application. GMCC
a written rill and gully survey each
's greater than nine inches (9") by
VII. Reveoetation
1. The Division proposes to approve the use of small Burnet, an
introduced species, in the reclamation seed mix. It is a
drought-tolerant forb which is highly palatable to livestock, deer
and elk. The proposed seed mix contains eight grasses, five forties
and three shrubs and should provide for the establishment of a
diverse, effective, vegetative cover. The applicant has submitted
information which shows that the introduced species is desirable
and necessary to achieve the approved post-mining land use, and is
not poisonous or noxious. (4.15.2).
2. The Division proposes to approve the use of straw mulch as a means
to meet soil stabilization requirements. (4.15.4).
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